Generate Signed Authorization Header:

1. Compute StringToSign:
					
StringToSign = HTTP-Verb + "\n" + 
Content-MD5 + "\n" + 
Content-Type + "\n" + 
Date + "\n" + 
CanonicalizedHeaders + 
CanonicalizedResource
							
2. Compute Signature:
					
Signature = 
Base64(Hmac-sha1(SK, UTF-8-Encoding-Of(StringToSign)))

3. Compute Authorization

Authorization = "OBS " + AK + ":" + Signature
: